Ventilating device.



A. MALINOVSZKY. VENTILATING DEVICE. I I APPLICATION PILED-SEPT. 8, 1910. 1,047,9 0, Patented Dec. 24,1912.

.inven/iorr My b free-end 33 o UNITED STATES PATENT OFFICE.

ANDREW MALINQVSZKY, 0F SCHENECTADY, NEW YORK, ASSIGNOR 0F ONE-HALF TO .mc'on J. UasoHnL, or TOLEDO, OHIO.

VENTILATING DEVICE.

Specification of ietters Patent.

Application filed September 8,1910. Serial No. 580,976. I I

To all whom it m concern: I 1

Be it known that. 1, ANDREW MALIN" ovsznv, acitizen ofthe United States, and a resident of No. 622 Congress street, in the city and county of Schenectady, New York,

electric circuit whereby either an alarm may be given, or ventilating means,- as a window or power driven fan, may be operated; or both these results may be simultaneously secured. In the drawing, which represents in broken'pers ective a preferredform of my device, 12 esignates a cylindric casing located substantially at the ceiling plane of a room 11' or other confined'space to be ventilated, in which casing is a small, open-end tube 13, communicating with the room 11 and funnel-shaped at 1ts lower end. The upper end of the casing 12 opens tothe outer air through a tube14, which may be provided with any convenient means, .not shown, at its upper end for the prevention of a back draft or reverse current.

Mounted within the casing 12 is a bracket 17 carrying at its upper and lower ends cupped set screws 18 and 19, between which is supported an axial shaft 20, on which is a fan 21, the blades of which rotate above the end of the tube 13. Mounted on the bracket 17 below the fan-'21 is a screen plate 22, apertured for the passage of thetube 13 and the free rotation of the shaft 20. Secured to but insulated from the bracket. 17 is a plate 23 carrying a two-pole electros magnet 24, in front of the poles of which is an insulated metal strip 25,. slotted at'26. Also mounted onthe bracket 17 by means of an insulating strip- 27 is a radially ex tending arm 28, onwhich is pivoted a wire 29, shown as havin an upturned lower end 30, and with a weight 31, which tends to maintain the wire in a vertical position.

Supported by but insulated from the set screw 19 is a'ipirally coiled spring 32, the

the path of pivotal movement 'ofthe swing- -which projects ra ally in' ing wire 29. Fast on the shaft 20 of the fan 21 is an insulating strip 34, carrying 'at Patented Dec.24, 1912.

one end ametal plate 35 perforated at 36 i for the free passage of the wire 29. The strip 34 also carries an insulated armature 37 positioned to move in the path of attrac-' tion of the poles of the magnet 24; and a metal blade 38 positioned to enter the slot. 26 in the strip 25 and to form therewith a knife-switch.

Outside of the casing 12 and at any desired points either within or without the room to be ventilated are a battery 41; an alarm signal, shown as 'a buzzer bell 42;

and a switch 43. In a window or any con venient opening in the wall 44 .of the room to be ventilated maybe provided'a motor driven fan 45 for rapidly changing the aii therein. 1 The wiring is as follows: From one pole of battery 41 a wire 51 passes to the lever of switch 43,, the buttons of which are con- 12, to a clip 56, whence a wire .57 passes to arm 28, WIth which wire 29 has metallic connection. From the other pole of battery 41 a wire 57 passes to the lever of a switch 58, one button of which is connected by wire 59 with one pole of the motor of a fan 45, the other motor pole of which is connected by wire 60 with the other button of switch 58, from which also leads a wire 61, passing through aperture 62 in casing 12, connecting through a clip 63 with slotted plate 25. Plate 25 is connectedby wire 64. to one pole of magnet 24, the other pole of which is connected by wire 65 to spiral spring 32. I Plate 36, through which swinging wire 29 passes, is connected by wire 66 to blade 38.

The operation of the device as here shown is as follows: If the air ofthe room'becomes overheated, or if illuminating gas escapes into the room, the heated air or gasrises through the tube 13, overcomes the inertia ofthe fan loo 21,'and, through the partial rotation of the i fan, the shaft 20 and the strip 34, swings the wire '29 so that its lower end contacts with the end of the-spiral spring 32, thus energizing magnet 24. The rotation of strip 34 also or with suicidal intent.

assists in making a good contact between blade 37 and'plate 25, completing a circuit which includes, with the switches 43 and 58 in the positions shown, battery 41, alarm 42, swinging wire 29, spring 32, knifesswitch 3825, ventilating device 453and connections as described. By throwing switch 43, the ventilating fan 45 may be operated without sounding the alarm 42; or by throwing switch 58, the alarm may be rung without operating the fan 45. It is obvious thatthe action of the alarm or the fan, or both, will continue until the 1 circuit is purposely broken, as at switch 43 or 58, when spring 32 will tend by its pressure against wire 29 -to return fan 21 to its normal position and thus open knife-switch 38'25 The function of screen-plate 22 is to pro tect the movingparts from a possible back draft or reverse current through tube 14.

It will be evident that my invention, whether in the form shown or in equivalent but mechanically altered-forms, may be in: stalled in many different ways and for divers purposes. Thus, the battery and alarm, without the ventilating means, may

be placed in the apartment to be regulated to call the attention of its occupant to its overheating or to the escape of gas. Or, the battery and ventilating device, without an alarm, may be employed to automatically renovate the air in the room. Or, the alarm may be placed in a hotel office and wired to each room to call a clerks attention to the escape of gas, whether this was accidental, Or, in the latter case, the resistance of the fan'may be increased, as by very slightly setting' down the screw 18, so that a relatively strong current through the tube 13 wouldbe required to make the circuit, when the device would form an efiicient-fire alarm.

Broadly considered, my invention includes any device for ameliorating or improving the condition of the air in an apartment, either by withdrawing overheated air. or gas therefrom, or by forcing oradmitting fresh. air thereonto, provided that such meansis set in operation by the action of a current of heated air or gas, the volume of the escaping gas being so small as'to be negligible. The ameliorating means may act either directly to ventilate the .room, or indirectly by calling the attention of an occupant or other interested person to the need of such ventilation, or by simultaneously employing both of these means. To avoid alternative claims, I will therefore use the phrase means for ameliorating the condit1on of the air to means either the alarm, the ventilating means, or both of these in conjunction. I prefer to utilize the escaping current of air or gas to closeor openan electric circuit, as in this way'a current too small to interfere with the heating of the room may be employed. It may be assumed that the escaping current is continuous, but the device is arranged so that an increased flow, caused by a high temperature or light gas is required to operate the-ameliorating means.

By the term negligible, as applied in the claims to the volume of air or other gas normally permitted to escape from the room, I intend a volume negligible with respect to the total. volume of air in the room, i. 6., so small as not to materially 'or noticeably affect the temperature or ventilation of the a negligible volume of a gas therefrom; an

- electric circuit; a closing device for said circuit located adjacent said aperture and hav ing a moving part actuable b the movement of such escaping gas theret rough; and means for ventilating the room controllable by the closure of said circuit.

ANDREW MALINOVSZKY. Witnesses GEO. I Coornn, ELIZABETH O. BAKEMAN. 

